The Jenolan Caves are limestone caves located within the Jenolan Karst Conservation Reserve in the Central Tablelands region, west of the Blue Mountains, in Jenolan, Oberon Council, New South Wales, in eastern Australia. The caves and 3,083-hectare (7,620-acre) reserve are situated approximately 175 kilometres (109 mi) west of Sydney, 20 kilometres (12 mi) east of Oberon and 30 kilometres (19 mi) west of Katoomba. Dating back to 340million years ago, it is the oldest known and dated open cave system in the world.

Joseph Benedict Chifley was an Australian politician and train driver who served as the 16th prime minister of Australia from 1945 to 1949. He held office as the leader of the Australian Labor Party (ALP), having previously served as the treasurer of Australia under Prime Minister John Curtin and later himself from 1941 to 1949. He was notable for defining Australia's post-war reconstruction efforts.